2 3° Analyfis of the AW. 



80 cubick inches oi new generated air, which 

 arofe from a fmall quantity of detonized 

 Nitre ; but the elafticity of this new air dai- 

 ly decreafed, in the fame manner as Mr. 

 Hawksbce obferved the air of fired Gun- 

 powder to do, Phyfico- mechanical Exper. 

 p. 83. fo that he found 19 of 20 parts occu- 

 pied by this air to be deferted in 18 days, 

 and its fpace filled by the afcending water; 

 at which flation it refted, continuing there 

 for 8 days without alteration: And in like 

 manner, I found that a considerable part of 

 the air which was produced by fire in the 

 dift illation of feveral fubftances, did gra- 

 dually lofe its elafticity in a few days after 

 the diftillation was over ; but it was not fo 

 when I dialled air thro' water, as in Expe- 

 riment 77. (Fig. 38. ) 



Experiment CHI. 



I placed on the fame pedeflal large Matches 

 made of linen rags dipped in melted Brim- 

 Jione: The capacity of the veflel, (Fig. 35.) 

 above z z the furface of the water, was 

 equal to 2024 cubick inches. The quantity 

 of air which was abforbed by the burning 

 Match ', was 198 cubick inches, equal to -~q 

 part of the whole air in the vc({q} 9 



I made 



